EP 0130322 A2 19850109 - Emulsion copolymerisation of meta- or para-isopropenyl-alpha,alpha-dimethylbenzylisocyanate.
Title (en)
Emulsion copolymerisation of meta- or para-isopropenyl-alpha,alpha-dimethylbenzylisocyanate.
Title (de)
Emulsionscopolymerisation von Meta- oder Para-Isopropenyl-alpha,alpha-dimethylbenzylisocyanat.
Title (fr)
Copolymêrisation en émulsion de méta- ou para-isopropényl-alpha,alpha-diméthylbenzylisocyanate.
Publication
Application
Priority
US 49992283 A 19830601
Abstract (en)
A method of making a copolymer of meta- or para-isopropenyl- alpha , alpha -dimethylbenzylisocyanate and at least one other ethylenically unsaturated comonomer polymerizable therewith, comprising polymerizing the meta- or para-isopropenyl- alpha , alpha -dimethylbenzylisocyanate and at least one other ethylenically unsaturated comonomer in an aqueous emulsion in the presence of a free-radical polymerization initiator and a chain transfer agent to control molecular weight. Also disclosed are methods of breaking the aqueous emulsion after polymerization is completed by either adding a salt, e.g., aluminum sulfate, or by freezing the emulsion followed by thawing to yield the copolymer as a mechanically separable solid phase of a two-phase liquid-solid mixture.
IPC 1-7
IPC 8 full level
C08F 2/00 (2006.01); C08F 2/02 (2006.01); C08F 2/22 (2006.01); C08F 6/22 (2006.01); C08F 212/14 (2006.01); C08F 246/00 (2006.01); C08G 18/00 (2006.01); C08G 18/72 (2006.01); C09D 175/00 (2006.01)
CPC (source: EP KR)
C08F 6/22 (2013.01 - EP); C08F 22/18 (2013.01 - KR); C08F 212/26 (2020.02 - EP); C08G 18/728 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0130322 A2 19850109; EP 0130322 A3 19850814; EP 0130322 B1 19900321; AT E51237 T1 19900415; CA 1224593 A 19870721; DE 3481708 D1 19900426; ES 533023 A0 19851001; ES 8507575 A1 19851001; JP S59227911 A 19841221; KR 850000478 A 19850227; KR 910003841 B1 19910612
DOCDB simple family (application)
EP 84105412 A 19840512; AT 84105412 T 19840512; CA 455400 A 19840530; DE 3481708 T 19840512; ES 533023 A 19840531; JP 10976784 A 19840531; KR 840003014 A 19840531